505404223353 has 28 divisors (see below), whose sum is σ = 768432443328. Its totient is φ = 332190535320.

The previous prime is 505404223351. The next prime is 505404223391. The reversal of 505404223353 is 353322404505.

505404223353 is a `hidden beast` number, since 5 + 0 + 540 + 42 + 23 + 3 + 53 = 666.

It is not a de Polignac number, because 505404223353 - 2¹ = 505404223351 is a prime.

It is a super-2 number, since 2×505404223353² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (505404223351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4830525 + ... + 4934042.

Almost surely, 2^505404223353 is an apocalyptic number.

It is an amenable number.

505404223353 is a deficient number, since it is larger than the sum of its proper divisors (263028219975).

505404223353 is an frugal number, since it uses more digits than its factorization.

505404223353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9764656 (or 9764641 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 36.

Adding to 505404223353 its reverse (353322404505), we get a palindrome (858726627858).

The spelling of 505404223353 in words is "five hundred five billion, four hundred four million, two hundred twenty-three thousand, three hundred fifty-three".